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NF A32 - 101 Standard for Grey Iron

We met the FGL degrees from Franch and Italy clients, but it is very difficult to find the standard NF A32-101 from internet. We found they are similar with China standard GB T9439 - 1998, so we modified the GB T9439 - 1998 into NF A32 - 101 1997 according to our understanding. Therefore, the following main content is not real NF A32-101 standard. We just made it for your reference.

This is a  standard for stipulating the physical properties of grey iron, or called as gray cast iron. This standard is similar with the other standards for grey iron such as ASTM A48 in USA, DIN 1691 in Germany and ISO 185. The following is the main content of NF A32 - 101 1997 standard for your reference.

Tensile strength of cast integral test bar and castings
Grade
 Cast integral test bar
Tensile strength
σb≥/Mpa
castings
Thickness
/mm
Tensile strength
σb≥/Mpa
FGL150
150
>2.5~10
>10~20
>20~30
>30~40
175
145
130
120
FGL200
200
>2.5~10
>10~20
>20~30
>30~40
220
195
170
160
FGL250
250
>4.0~10
>10~20
>20~30
>30~50
270
240
220
200
FGL300
300
>10~20
>20~30
>30~50
290
250
230
FGL350
350
>10~20
>20~30
>30~50
340
290
260
 
The hardness grade and range of Grey cast iron
Grade
Hardness grade
Hardness range of casting
HBS
Relevant microstructure
FGL150
H175
150~200
ferrite+pearlite
FGL200
H195
170~220
pearlite
FGL250
H215
190~240
pearlite
FGL300
H235
210~260
pearlite(inoculated cast iron)
FGL350
H255
230~280
pearlite(inoculated cast iron)
 
The example of Chemical analysis of Grey cast ironmass fraction)(%)
Grade
Thickness
/mm
C
Si
Mn
P
S
FGL150
<30
30~50
>50
3.3~3.5
3.2~3.5
3.2~3.5
2.0~2.4
1.9~2.3
1.8~2.2
0.5~0.8
0.5~0.8
0.6~0.9
0.2
0.2
0.2
0.12
0.12
0.12
FGL200
<30
30~50
>50
3.2~3.5
3.1~3.4
3.0~3.3
1.6~2.0
1.5~1.8
1.4~1.6
1.7~0.9
0.8~1.0
0.8~1.0
0.15
0.15
0.15
0.12
0.12
0.12
FGL250
<30
30~50
>50
3.0~3.3
2.9~3.2
2.8~3.1
1.4~1.7
1.3~1.6
1.2~1.5
0.8~1.0
0.9~1.1
1.0~1.2
0.15
0.15
0.15
0.12
0.12
0.12
FGL300
<30
30~50
>50
2.9~3.2
2.9~3.2
2.8~3.1
1.4~1.7
1.2~1.5
1.1~1.4
0.8~1.0
0.9~1.1
1.0~1.2
0.15
0.15
0.15
0.10
0.10
0.10

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